U形-箱形组合结构连续梁力学特性研究

U形-箱形组合连续梁计算现阶段缺乏具体的经验和理论公式,文中在杆系模型分析的基础上,采用通用有限元程序ABAQUS分析了结构典型部位的受力情况,研究了该类桥梁在多种工况下的力学行为和受力机理。结果表明:U形-箱形组合连续梁力学特性明显区别于传统梁型,空间受力特性明显;由于横向变形导致U形梁腹板内、外侧应力存在差异,平截面假定已不适用。

Research on Mechanical Properties of U-box Composite Continuous Beam

U-box composite continuous beam is a new structure,and there is little experience and theories in this field.Based on the basic results of the plane bar system program,the general finite element program ABAQUS was used for creating solid finite element model to calculate and study the mechanical behavior of the structure under various working conditions.The results indicate that U-box composite continuous beam is different from the traditional beam because of obvious spatial stress characteristics.There are difference between the internal and external stresses of U-beam web due to the lateral deformation,therefore the plane section assumption is not applicable.